Mechanism for controlling winding pressure of precision winder



May 5, 1970 SHIN TSUKUMA ETA!- 3,510,078

MECHANISM FOR CONTROLLING WINDING PRESSURE OF PRECISION WINDER Filed Jan. 9, 1967 4 Sheets-Sheet 1 May 5, I970 sum TSUKUMA E AL 3,510,078

MECHANISM FOR CONTROLLING WINDING PRESSURE 0F PRECISION WINDER Filed Jan. 9, 1967 4 Sheets-Sheet 2 May 5, 1970 4 SHIN TSUKUMA ETAL 3 510 078 MECHANISM FOR CONTROLLING WINDING PRESSURE OF PRECISION wmnsn Filed Jan. 9, 1967 4 Sheets-Sheet 3 FIG 3 20 l May 5, 1970' SHIN TSUKUMA E AL 3,510,078

MECHANISM FOR CONTROLLING WINDING PRESSURE OF PRECISION WINDER Filed Jan. 9, 196'? 4 Sheets-Sheet 4 United States Patent 3 510,078 MECHANISM FOR ONTROLLING WINDING PRESSURE 0F PRECISION WIN DER Shin Tsukuma, Itami-shi, and AkiO Higuchi, Takatsukishi, Japan, assignors to Kamitsu Seisakusho Ltd., Itamishi, Hyogo-ken, Japan, a Japanese company Filed Jan. 9, 1967, Ser. No. 608,150 Int. Cl. B65h 54/08 US. Cl. 242-18 6 Claims ABSTRACT OF THE DISCLOSURE A device for controlling winding pressure on a package used in a precision winder having a roller bail extending along the whole length of a package. Increases in the diameter of the winding package causes the contacting of a roller bail with the package and rotation of the roller bail. This rotation of the roller bail is transmitted in a reduced speed condition to a roller bail receding means and actuates receding means and actuated receding motion thereof. Thus, contacting pressure between the package and the roller bail is maintained very low on account of the slight contact between the two. The package obtained has relatively uniform and low hardness and is suitable for package dyeing.

The present invention relates to a device in a precision winder for controlling the winding pressure on a winding package. In the case of the conventional precision winders, the traverse guide or the roller bail is generally maintained in a contacting condition with the peripheral surface of the winding package and the relative position of the yarn guide and a spindle supporting the package is shifted by a contact pressure between the traverse guide and the peripheral surface of winding package in accordance with increase in the diameter of the package during winding operation. On account of the above-described mechanical arrangement, the hardness of the package is mainly dependent upon the contacting pressure and this fact results in difficulty in the winding of soft packages. As is well-known, soft packages are generally favored in the process of package dyeing of cheeses or cones. So, it was difiicult or almost impossible to produce soft packages suitable for package dyeing by utilizing the precision winders of the conventional type.

An object of the present invention is to provide a device for controlling winding pressure on a package to a remarkably low one or for maintaining the pressure at almost no pressure during the winding operation on a precision winder.

Another object of the present invention is to provide a device for controlling winding pressure on a winding package to produce a very soft package having uniform hardness which is suitable for package dyeing of cheese or cone.

Still another object of the present invention is to provide a novel device for controlling winding pressure on a winding package used for precision winders which has relatively simple mechanical construction assuring easy maintenance control and suitability for a variety of yarns.

Still another object of the present invention is to provide a novel device for controlling winding pressure on a winding package used for precision winders which requires no special power source such as an electric motor for receding a traverse yarn guide away from the package but only rotation of the package itself.

In order to attain the above-described objects, the device of the present invention comprises a roller bail rotatably disposed to a cam box containing mechanism for actuating the traverse yarn guide along at least the Whole length of the package and adapted to contact a peripheral surface of the package, means for receding the roller bail away from the package and vice versa and means for transmitting rotation of the roller bail to the receding means in a reduced speed condition in order to actuate the receding means.

In this respect, the term receded condition of the roll er bail away from the package and vice versa as hereinafter used refers to a condition wherein the surfaces of the two are mutually contacted with a contacting pressure substantially equal to zero. Such receded condition between the two is the most outstanding feature of the present invention.

Further objects and advantages of the present invention will be apparent from the following description, reference being made to the accompanying drawings wherein preferred embodiments of the present invention are clearly shown.

FIG. 1 is a front view of an embodiment of a device for controlling the winding pressure between a winding package and a traverse device of a winding machine according to the invention,

FIG. 2 is a plan view of the device shown in FIG. 1,

FIG. 3 is an enlarged view of the device of the invention shown from III-III in FIG. 1,

FIG. 4 is a front view of another embodiment of the device for controlling the winding pressure between a winding package and a traverse device of a winding machine according to the invention.

FIG. 5 is a plan view of the device shown in FIG. 4,

FIG. 6 is an elevation of a reduction gear part shown from VI-VI in FIG. 4.

Referring to FIGS. 1, 2 and 3, a spindle 2 is supported by a winding unit 1, and a bobbin 3 for holding yarn layer is mounted on the spindle 2.

An arm 6 is pivoted at its one end to a shaft 7 mounted on the winding unit 1 and to another end of the arm 6 a cam box 4 is secured. In the cam box 4, a cam mechanism for actuating a traversing motion of a traverse yarn guide 5 is contained.

The spindle 2 is driven by a power transmission mechanism (not shown) in a direction shown by an arrow in FIG. 1, while the spindle 2 is related to the cam mechanism of the cam box 4 so as to wind the yarn around the bobbin 3.

At the portion adjacent to the bobbin side of the cam box 4, a roller bail 9 is disposed. The disposition of the roller bail 9 is so designed as is adapted to contact the peripherical surface of the winding package and extends along the whole length of the package. A pulley 8 of a small diameter is secured to an end of the roller bail 9, and a reduction device 11 is secured to the cam box '4 on the side opposite to the roller bail 9- in such a way that the reduction device 11 can swing with the cam box 4, a pulley 10 of a large diameter is mounted on an input shaft 26, of the reduction device 11. Rotation of the large pulley 10 is caused by the rotation of the roller bail 9, to one end of which is the small pulley 8 disposed, by way of a belt drive 12. On account of the difference in diameters in the both pulleys, the rotating speed of the input shaft 26 is reduced from that of the roller bail 9.

.Another small pulley 13 is mounted on an output shaft 27 of the reduction device 11. In a coaxial condition with the output shaft 27, a further projection 28 is formed on the reduction device and a lever 14 is turna-bly disposed to the projection 28. At another end of the lever 14, is a pulley 15 rotatably disposed and a small gear 16 is secured to the pulley 15 in a coaxial condition. The rotation of the pulley 15 is actuated by the rotation of the small pulley 13 by a belt drive 18. Consequently, the rotation of the small pulley 13 causes the rotation of the small gear 16.

A lever 21 is turnably mounted on a shaft 20 secured to the arm 6, another shaft 17 is passed through an oblong aperture 24 disposed to a top end portion of a connecting lever 23 which is formed as one body with the lever 21. A lever 22 is also secured to the shaft 20 and a spring 25 is disposed between the free end of both levers 21 and 22. In the drawing, the expanding force of the spring 25 tends to turn the lever 21 in the clockwise direction around the shaft 20 and this clockwise turning of the lever 21 accompanies clockwise turning of the lever 23 which is formed as a body with the lever 21. Consequently, the small gear 16 is urged against the large gear 19 which is fixed to the winding unit 1.

As mentioned above, the rotation of the roller bail 9 is transmitted to the small gear 16 with the speed considerably reduced, consequently, the small torque of rotation of the roller bail 9 is transmitted to the small gear 16 with increased torque of rotation. As the roller bail 9 is rotated counterclockwise by the frictional contact with the spindle 2 rotating clockwise in FIG. 1, the small gear 16 is rotated clockwise. As is already mentioned, the large gear 19 is mounted stationary on the winding unit 1 and the clockwise rotation of the small gear 16 causes leftwards traveling of the small gear 16 along the periphery of the large gear 19 in the drawing of FIG. I. In order to permit this leftwards traveling of the small gear 16, the arm 6 is forced to turn in the clockwise direction around the shaft 7. As is already mentioned, the cam box 4 is secured to another end of the arm 6, and recedes away from the package wound on the bobbin 3 with the clockwise turning of the arm 6. That is, when the diameter of the winding package on the bobbin 3 increases and the package begins to contact with the roller bail 9, a slight rotation is bestowed to the roller bail 9 and when the roller bail 9 rotates, the rotation of the roller bail 9 is transmitted to the small gear 16 and then the cam box 4 recedes from the package as described above, and the contact between the package 3 and the roller bail 9 is released. As is well known, a relatively long time is required for the diameter of the winding package to become large and the receding motion of the cam box 4 is therefor extremely slow.

When the full packaged cheese or cone is to be dolfed, the movable lever 21 is pulled toward the fixed lever 22 by grasping it by hand so as to compress the spring 25, thereby the meshing of small gear 16 with the large gear 19 is released and the cam box 4 can be moved by manual operation.

Referring to FIGS. 4, and 6 showing another embodiment of the device of the present invention, a spindle 102 is supported by a winding unit 101, and a bobbin 103 for winding yarn thereon is mounted on the spindle 102. A cam mechanism for traversing a traverse yarn guide 105 is contained in a cam box 104, an arm 106 is turnably disposed to a shaft 107 secured to the winding unit 101 and the cam box 104 is secured to the winding unit 101. The spindle 102 is mounted on the arm 106 and is turned together with the arm 106.

-At the portion adjacent to the bobbin side of the cam box 104, a roller bail 109 rotatably is disposed. A pulley 110 of a small diameter is secured at an end of the roller bail 109, a reduction device 112 is secured to the winding unit 101, and a pulley 111 of a large diameter is secured to an input shaft 118 of the reduction device 112. The pulley 111 is driven by the pulley 110 by means of belt 113 by the rotation of the roller bail 109, consequently, the rotation of the input shaft 118 is reduced. A small gear 114 is secured to an output shaft 119 of the reduction device 112.

A shaft 116 is secured to the middle portion of the arm 106 and a lever 115 is turnably mounted on the shaft 116. The lever 115 is provided with an internal sector gear 115 adapted to mesh with a small gear 114 mounted on the output shaft 119. The lever 115 is formed as to have a curvature whose center of curvature falls on the center of the shaft 107. A branch lever 117 of the lever is extended upward as shown in FIG. 4. The arm 106 is provided with a branch lever 106 extended upward as shown in FIG. 4. A spring is disposed between the branch levers 106' and 117 and the expanding force of the spring 120 tends to turn the branch lever 117 in the counterclockwise direction around the shaft 116, thereby the small gear 114 being always urged to mesh with the internal sector gear 115' of the lever 115. Separation of the small gear 114 away from the internal sector gear 115' can be achieved by compressing the spring 120 'by tightly gripping the branch lever 106 and 117 by hand.

As mentioned above, the rotation of the roller bail 109 is transmitted to the small gear 114 with the rotation speed considerably reduced, consequently, small torque of rotation of the roller bail 109 is transmitted to the small gear 114 with increased torque of rotation. As the roller bail 109 is rotated counterclockwise due to the frictional contact with the periphery of a package 108 rotating clockwise in FIG. 4, the small gear 114 is rotated clockwise. Then, the lever 115 is required to move rightwards so as to permit rotation of the small gear 114 meshing with the internal sector gear 115', and this rightwards movement of the lever 115 accompanies a clockwise turning of the arm 106 around the shaft 107 in FIG. 4. That is, when the diameter of the winding package 108 increases and the package 108 contacts the roller bail 109, a slight rotation is bestowed to the roller bail 109. Then the rotation of the roller bail 109 is transmitted to the small gear 114 and the arm supporting the spindle 102 recedes from the roller bail 109 as is described above, and the contact between the package 103 and the roller bail 109 is released.

In case of doffing the full packaged cheese or cone, the spring 120 is compressed by gripping the levers 106' and 117 by hand, thereby the meshing of the small gear 114 with the internal sector gear 115' is released. Then the (package is put in a condition ready for rotation by As is described above, by utilizing the controlling device of present invention, a spindle or a traverse device is positively shifted so as to release the contact between the package and the traverse device as the diameter of the package increases, consequently, the Winding pressure on the winding package can be maintained at almost zero pressure and very soft package of cheese or cones having uniform hardness can be obtained.

While the invention has been described in conjunction with certain embodiments thereof it is to be understood that various modifications and changes may be made without departing from the spirit and scope of the invention:

What is claimed is:

1. A device for controlling yarn winding pressure on a package comprising: a rotationally driven spindle for supporting a bobbin on which yarn is wound in the form of a package during a winding operation; a rotatably mounted roller bail extending along the whole length of the bobbin; means mounting said rotatably mounted roller bail in a position lightly contacting a peripheral surface of the package for effecting frictional rotation of said roller bail during the winding operation and for backing away said rotatably mounted roller bail from the package; said means comprising a stationary shaft, an arm rotatably mounted on said stationary shaft, a gear sector fixed on said stationary shaft; support means on said arm for supporting said rotatably mounted roller bail, a speed reduction device connected to said support means including rotatably mounted input and output shafts, a first pulley secured to an end of said rotatably mounted roller bail, a second pulley mounted on said input shaft, a belt drive interconnecting said first and second pulleys, a third pulley mounted on said output shaft, an extension coaxial with and extending from said output shaft, a

first lever having a mounting shaft at one end and rotatably mounted on said extension at its other end, a fourth pulley rotatably mounted on said mounting shaft, a belt drive interconnecting said third and fourth pulleys, and a small gear secured to said fourth pulley and disengagably meshing with said gear sector.

2. A device according to claim 1; further comprising manual means for manually disengaging said small gear from said gear sector.

3. A device according to claim 2; wherein said manual means comprises another shaft secured to said arm, a second lever rotatably mounted on said another shaft, a third lever secured to said another shaft, a spring disposed between said second and third levers normally biasing them apart, and a connecting lever having one end rotatably mounted on said another shaft and having an elongated aperture in its other end through which said mounting shaft protrudes; whereby said small gear is disengaged from said gear sector by manually pressing together said second and third levers.

4. A device for controlling yarn Winding pressure on a package comprising: a rotationally driven spindle for supporting a bobbin on which yarn is wound in the form of a package during a winding operation; a rotatably mounted roller bail extending along the whole length of the bobbin; means mounting said rotationally driven spindle in a position wherein a peripheral surface of the package lightly contacts said rotatably mounted roller bail for frictionally rotating said roller bail during the winding operation and for backing away the package from said rotatably mounted roller bail; said means comprising a stationary shaft, an arm rotatably mounted on said stationary shaft, said spindle being supported on said arm, another shaft secured to said arm, a lever rotatably mounted at an intermediate portion thereof on said another shaft and having two arms extending outwardly therefrom, one of said two arms terminating in a gear sector, a speed reduction device including rotatably mounted input and output shafts, a first pulley secured to an end of said rotatably mounted roller bail, a second pulley mounted on said input shaft, a belt drive inter connecting said first and second pulleys, and a small gear mounted on said output shaft and disengagably meshing with said gear sector.

5. A device according to claim 4; further comprising manual means for manually disengaging said gear sector from said small gear.

6. A device according to claim 5; wherein said manual means comprises another lever secured to said arm which is rotatably mounted on said stationary shaft and positioned adjacent the other of said two arms, and a spring disposed between said another lever and the other of said two arms normally biasing them apart; whereby said small gear is disengaged from said gear sector by manually pressing together said another lever and the other of said two arms.

References Cited UNITED STATES PATENTS 2,176,182 10/1939 Kinsella et al.

2,335,975 12/1943 Stahl et a1 242-18 2,463,773 3/1949 Jencks 242-18 2,466,600 4/1949 Lawson 242-18 X 2,740,589 4/ 1956 Keith 24218 2,740,590 4/1956 Keith 242-18 2,769,299 11/1956 Keith 242-18 X 2,972,450 2/1961 Brierley 242-18 3,367,587 2/1968 Klink et al. 242-18 FOREIGN PATENTS 1,041,400 9/ 1966 Great Britain.

STANLEY N. GILREATH, Primary Examiner 

